• A “weird tray” turned out to be a bed/lap desk with a missing metal bar used to prop it up.
• A tiny door inside a door? It’s a speakeasy hatch for talking to someone without opening the main door.
• Numbered clothes pegs help manufacturers track which mold part is defective.
• A wall device with a hole and tiny screen is a pool access alarm to prevent kids or pets from entering unattended.
• A spiked wooden ball found in bushes was actually DIY garden art inspired by allium flowers.
• A metal tube near a German trash area is a Schlüsselrohr — it hides the dumpster key.
• A pocketknife attachment with a spinning wheel is a pocket glass cutter.
• A box with arrows and no wires is a cigar humidifier.
• A stone found in a yard was not a survey marker but a small grave marker.
• The small ramp on a lotion bottle is used during manufacturing so the bottle can rotate while standing.
The world is full of odd, fascinating objects — and the internet is always ready to solve the mystery.